Java v2 Add S3 Express Scenario

[scmacdon]

This pull request adds Java S3 Express Scenario

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[tkhill-AWS]

Overall comments

Always refer to "regular" buckets rather than "normal" buckets. Lowercase the "d" in "Directory buckets".

README changes

• The README for this S3Express Basics Scenario has the wrong title. It reads "Amazon S3 Batch Basics Scenario".
• Under the [Setting up Resources](Amazon S3 Batch Basics Scenario) section, it says an IAM role will be created by a CloudFormation template, but this is not accurate for this Java implementation.

Specification changes

• In the Overview section, change "...using the AWS SDK." to "...using an AWS SDK." Lowercase "Directory" in "Directory bucket".

• In the Resources and User Input section, "{bunch of stuff}" should be replaced.

• Under Scenario Program Flow,

  • First item - I don't think we should do the VPC endpoint, unless we plan to create a runnable jar with instructions on how to do get that up and running on an EC2 instance. If we do go with it, I think what needs to happen is the VPC endpoint needs to be created in whatever VPC the EC2 instance is currently running it, because if you create a new VPC, the current EC2 instance won't have launched in it. You'd have to relaunch the EC2 instance into the new VPC.
  • Second item - Don't create IAM users with long-lived credentials. Just create roles and assume them. This example should use 2 roles with different permssions rather than creating two IAM users with long-lived credentials. This is a best practice, so this is what we should show users.

I'm still reviewing ....

[tkhill-AWS]

I've done as much review as I have time for. Check out the comment with the "Overall Comments". It contains comments related to the README and Specification.

[tkhill-AWS]

Scott and I went through the changes in our weekly meeting. Scott will send my concers regarding the VPC issue and IAM user creation to Jason.

[scmacdon]

I sent the feedback about Spec, etc to Jason.